Attaching-plug.



Witnesses.

PATENTED AUG. 11, 1908 H. GEISENHONER. ATTAGHING PLUG.

APPLICIATION FILED AUG. l22, 1903.

Inventor.

by Y

may

Henry (Seiserwllrwer .i socket or receptacle.

HENRr Gnrsnunonnn, or sonENncrAnY, NEW COMPANY, A CORPORATION or YORK,ASSIGNOR T Q. GENERAL ELECTRIC Nnw voran.

ATTAGHING-PLU'Gr To all whom it muy concern: -Be 1t known that I., HENRYGsisnNrrNEn, acrtizen of the United States, residing at Schenectady, inthe county of Schenectady,' l

State of New York, have invented certain new and useful lmprovcients inAttaching- Plugs, of which the following is a specifica` tion.'

.The object of the present invention is to provide an improved attachingplug which may be readily inserted in the l'ordinary incandescent lampsocket or receptacle without rotin-tion, and by which the electriccircuit may disturbance of the plug in relation to the In carrying' outmy invention l provide a base of insulating material adaptedl to bcthrust longitudinally of an ordinary lamp socket or receptacle uponwhich are mounted a center vcontact and a spring-blade side contactniovable radially by a key into engagement with the inner surface ot'the contact shell of the socket or receptacle, and on the outer end ofwhich are mounted suitable binding posts respectively connected to thecenter' and side contacts and to which the electric con. ductors may besecured in the usual manner. For a more complete understanding of rninvention reference may be had to the following description and theaccompanying drawing forming a part of this speciiication, in whichFigure 1 is a longitudinal section of a lamp shade andholder and a sideelevation of a socket with an attaching plugembodying my inventionconnected "thereto,- Fig. 2 is a broken longitudinal section of theattaching-plug drawn to a slightly larger scale;' Fig.,3 isv anelevation of the front end of the base part withthe key shaft andcover-hold-4 ing screw shown in section; and Fig. 4 is aninnerend'elevation of the plug base.

A The base l of the attaching-plug is made of porcelain or othersuitable insulating ma- V terial, and is formed with a largercylindrical outer section 2 and a smaller cylindrical inner section 3with an intervening shoulder 4,

The outer end is provided with a cup-sha ed recess 5, from the bottom ofwhich eXtenr an axial aperture 6 to the inner end of the plug and arectangular side aperture 7 to 'the shoulder 4 from which it continuesalong the 55 side of the inner section 8 in the former1 an Specificationof-Letters Patent. Application filed August '22, 1903.

be completed oribroken without into the contact-shell Patented Aug. 11,1908. serial No. 170,377.

open channel 8. The inner section 3 is ol a size to freely passlongitudinally without relation into the contact-shell of the ordinaryamp socket and is provided with an inner end in a plane atright anglesto its axis .having its peripheral corner chainl'ered and the portionsabout the central aperti-rre 6 counter sunk.

A center contactcensisting df a-Inetallic` washer 9 with its lcentralportion struck up 65 and adapted to ent er the counter-sunk end oi" thevaperture 6 and having a circular slit v10 between the struck-up portionand its periphery whereby a portion of the outer edge is rendered freeto be permanently bent up out of the plane of the inainportion of thewasher to form a yicldable enntact surface. The washer 9 is secured tothe end ofthe plug by means of a screw 11 exten ingl therethrongh,through the axial aperture 6 and 75 engaging a tapped hole in a terminalplate 1? in the bottom of the recess 5.

Theplate l2 has two arms disposed at right angles, in one. of which isprovided a binding screw 1.3, and inthe other a ta ed hole for thereception of the `cover-ho fing screw 1li. A second terminal plate 15 issecured in the recess 5 by a screw 16 and provided at one end with abinding-screw 17. To the opposite end of the plate 15 is secured aspring contact blade 18 which extends through the side aperture 7 andthe open channel 8 to near the inner end of the plug. The blade isprovided with oorrugations 19 which correspond with the threads on theContact shell of the standard Edison socket and are designed to hold'theplug'froin pulling out whenthe .blade has been forced into electricalcontact with the socket contact shell. The opposite sid'e of the smallsection 3 of the base may be provided with a series of short grooves'20toengage the thread on the Oppoifte side of the socket shell so as toovercome the tendency of the plug to cant to one side. The cover 21 isalso .made of porloo .celain or. other suitable insulation, and Visformed with a diameter equal-to that of the larger section of the baseand has a central aperture 22 for the passage therethrough of theconductor wires, a side counter-sunk hole'. 105

23for the holding-screw 14, and on the oppo site side a cylindricalaperture 24.

The means for forcing the spring Contact blade 18 outward intoengagement with the contact-shell or' the socket consists of a key 110the key is provided with a thumb-piecel 29 of' 'vgrooved forther'eception of a spring washer 25 comprisingA a shank 26 extendingthrough nent lengagement with they contacts of-Y the l' lamp socketWithout removal of the lampsha e,

vsprlng contact blade to move inward out of contacts mounted onsaid'base', andhand-v said base, and means for forcing said side theaperture 24 of the/cover andlying in a groove 27 formed on the inner-Wall of the side aperture 7 and channel 8, and provided at its innerend with a nib or projection 28 which engag'Je's at its end with t eback ofthe contact' lade when turnede The outer end of moldedinsulation, and at the inner face of thefcover its shank is.circumferentially 30'. which serves to hold the-key from longiftudinaldisplacement relative to the cover.

In order that the key may be arrested when the nib 28 is at the highestpoint of its arc/ of travel, a` stop 31 is provided upon the. contactblade 18 in its ath of rotation.

As is apparent from ig. 1 the attachingplug .may be inserted and clampedin permaaswould ordinarily be necessary 1n connecting theattaching-plugs heretofore in use. 'Moreover, in case it be connected toa keyless socket or receptacle the circuit may be readily broken withoutvremoval of the plug by merely turning its key to permit' the engagementwith. the cont socket or receptacle.

Idonot wish to limit myself to the particular sha e or arrangement ofparts shown and'descri ed, foi-,it 1s apparent that theyI maybe changedand modled without departing from my invention.

What I claimas new and desire to secure by Letters Patent of the-UnitedStates', is:

1. An attaching-plu comprisin an insu-,v latin base adapted to e thrusten Wise into a societ or receptacle, metallic en d and side act .shellof the contact radially outward.

'lating base adapted to 4. An attaching-plu comprising an insulatin baseadapted toe thrustf'ndwise into a soc et or receptacle, a metallicKcontact se-4 cured to one end thereof, a spring contact mounted in achannel in one side of saidl base,

and means for forcing said spring contactv outwardly.

5. An attaching-plug comprisin an insulating base having a cylindricaportion adapted to be thrust endwise into a socket or receptacle'andprovided with a side channel, a metallic contact secured to the end ofsaid base; a -spring'contact blade secured to said base and normallylying within said channel,

and a key adapted to engage sa'il contact blade and force it outwardly.

6. An attaching-plug comprising an insue thrust endwise into v athreaded contactshell offa socket or receptacle,l a, metallic centercontactv mountedV thereon, a spring contact blade mounted upon the sidethereof and provided With cor.- rugations adapted to engage the threadsof the contact shell, and'means for moving said blade outwardly. .y

7. An attaching-plug comprising an insulating base provided withterminal plates, end and side contact members respectively connectedto'said plates, and a rotary key adapted to engage saidside contact andforce it radiall'o'u'tward.-

8. An attac ing-plug comprisin an insu*- tion provided on one side witha series .of transverse ribs and a channel in the opposite lating basehaving a reduced cylin 'rical porside, a center contact secured to theend of said cylindrical portion, and a movable corruvated contact bladesecured in said chan- ,9. A lug comprising a body of insulatin lmateria,a contact carried thereby an adapted to engage one ofthe contacts of thesocket,a' mova contact (if the socket, sald movable contact be' formedwith threads, and means carried y the plug to operate said movablecontact to force the threads thereof into engagement with the threads ofthe socket.

In witness whereof, I have hereunto set my hand this 20th da of August,1903. v

v- HE RY GEISENHONER. Witnesses:

` BENJAMIN B. HULL,

EDWARD N. VAN Corr.

le contact carried bythev body and'adapted to engage the remaining ioo

